Amazonian epoch
Proper noun
Meaning
the Amazonian epoch
The most recent of the Martian geologic epochs, from approximately 1.8 billion (1800 million) years ago (the end of the Hesperian epoch) to the present.
Proper noun
the Amazonian epoch
The most recent of the Martian geologic epochs, from approximately 1.8 billion (1800 million) years ago (the end of the Hesperian epoch) to the present.